Relief Valve (Swing) - Test and Adjust
Show/hide table
| Required Tools | ||
|---|---|---|
| Part Number | Description | Qty |
| 8T-0861 | Pressure Gauge ( 60000 kPa (8700 psi)) |
1 |
- Position the machine on level ground.
- Stop the engine.
- Release the pressure in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic System Pressure - Release".
- Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) .
Show/hide table
 | |
| Illustration 1 | g00952442 |
Pump compartment (1) Pressure tap (delivery pressure of the drive pump) (2) Pressure tap (delivery pressure of the idler pump ) (3) Pressure tap (power shift pressure) | |
- Disconnect connector (28) from swing parking brake solenoid valve (29) .
Show/hide table
 | |
| Illustration 2 | g00952563 |
Pilot oil manifold (28) Connector (29) Swing parking brake solenoid valve | |
- Start the engine.
- Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF.
Reference: Refer to Testing And Adjusting, "Engine Performance - Test" for engine rpm settings.
- Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
- Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (25) at pressure tap (2) .
Show/hide table
 | |
| Illustration 3 | g00952568 |
Swing motor (22) Adjustment plug (23) Locknut (24) Relief valve (left swing) (25) Relief valve (right swing) (26) Adjustment plug (27) Locknut | |
- Return the swing joystick to the NEUTRAL position.
- The pressure setting of the swing relief valve is 26000 ± 980 kPa (3750 ± 140 psi). If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
- In order to adjust the swing relief valve, loosen locknut (23). Turn adjustment plug (22) until the pressure gauge reading at pressure tap (2) is 26000 ± 980 kPa (3750 ± 140 psi).
Note: Turning adjustment plug (22) clockwise increases the pressure. Turning adjustment plug (22) counterclockwise decreases the pressure.
Note: Always make final pressure adjustments on pressure rise.
- Tighten locknut (23) to a torque of 117 ± 10 N·m (85 ± 7 lb ft).
- Slowly move the swing joystick for a full SWING LEFT operation and check the pressure for relief valve (24) at pressure tap (2) .
- Return the swing joystick to the NEUTRAL position.
- The pressure setting of the swing relief valve is 26000 ± 980 kPa (3750 ± 140 psi). If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
- In order to adjust the swing relief valve, loosen locknut (27). Turn adjustment plug (26) until the pressure gauge reading at pressure tap (2) is 26000 ± 980 kPa (3750 ± 140 psi).
Note: Turning adjustment plug (26) clockwise increases the pressure. Turning adjustment plug (26) counterclockwise decreases the pressure.
Note: Always make final pressure adjustments on pressure rise.
- Tighten locknut (27) to a torque of 117 ± 10 N·m (85 ± 7 lb ft).
- After completing the test and/or the adjustment procedures for the swing relief valves, stop the engine.
- Release the pressure in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic System Pressure - Release".
- Connect connector (28) to the solenoid valve for swing parking brake (29) .
Caterpillar Information System:
325C Material Handler Hydraulic System Stick Hydraulic System
365B, 365B Series II and 365BL Excavators Cooling System Coolant Sample (Level 2) - Obtain
365B, 365B Series II and 365BL Excavators Cooling System Coolant Sample (Level 1) - Obtain
325C Material Handler Hydraulic System Boom Hydraulic System
Bench Test Procedure for Hydraulic Piston Pumps {0784, 5070} Bench Test Procedure for Hydraulic Piston Pumps {0784, 5070}
325C Excavator Safety Messages
2003/02/03 Special Instruction, REHS1238, "Obtaining Factory Passwords and Software Enabled Attachments" is Available {7610}
2003/02/03 A New Electronic Controller for the Air Inlet Heater (AIH) Improves the Engine Starting Ability {1090}
321C CR Excavator Hydraulic System Relief Valve (Line) - Test and Adjust
321C CR Excavator Hydraulic System Relief Valve (Crossover) - Test and Adjust
321C CR Excavator Hydraulic System Relief Valve (Main) - Test and Adjust
G315, G320 and G330 Demolition and Sorting Grapples Reference Material
325C Material Handler Hydraulic System Grapple Hydraulic System
3054E Industrial Engine Engine Oil Filter Base - Remove and Install
345B Series II Material Handler Specifications
321C CR Excavator Hydraulic System Swing Motor - Test - Measurement of Case Drain Oil
3054E Industrial Engine Engine Oil Cooler - Remove
3054E Industrial Engine Engine Oil Cooler - Install
325C Material Handler Hydraulic System Relief Valve (Line) - Test and Adjust
C13, C15, and C18 Tier 4 Final Engines Water Pump
Procedure for the Repair of the Compensating Valves in the Main Hydraulic Control Valve{5051, 5086} Procedure for the Repair of the Compensating Valves in the Main Hydraulic Control Valve{5051, 5086}
3054E Industrial Engine Water Pump - Remove and Install
320C Excavator Machine System Specifications Pilot Lines
320C Excavator Machine System Specifications Pilot Lines